Bicycle Key Lock for V-Brakes CTB/MTB Cylinder Ring Lock GORIN GR-920-K Black [About this product] Brand: GORIN Part Number/Model Number: GR920-K ASIN: B0091GJXXO Product Type: Rear Wheel Lock Lock Type: Key Lock Accessories: Mounting parts (large bracket, 2 keys) Product Dimensions (Length x Width x Height): ￥50 x 140 x 150 mm Item Weight: 1.1 pounds ※ The tip of the key in the image is hidden for security reasons. There were some minor scratches, so I listed it as "Like New," but it's actually "Unused" because I couldn't install it on my bicycle. Please check if it can be installed on your bicycle before purchasing. I am unfamiliar with bicycles, so I cannot answer questions about whether it can be installed. ※ Embarrassingly, I actually bought something I couldn't install... (>_<) ※ Some models cannot be installed, and some models may have the lock interfere with your feet while riding, so please check with the bicycle shop where you purchased your bicycle to confirm compatibility. ※ Tools such as a screwdriver are required for installation. ※ A simple instruction manual for installing the product is included, but specialized knowledge of bicycle structures, etc., is required. ※ If you are not confident in installing it, please ask a nearby bicycle shop to do the work (for a fee) to avoid accidents caused by incorrect installation. ※ To ensure long-term use, apply lubricant to the mechanism every three months. If oil gets on the key, wipe it off before storing it to prevent staining clothing, etc. Thank you for viewing. We hope you will consider it.